Cross beam type traveling wave linear ultrasonic motor with fixed end part

Abstract

The invention provides an end-fixed cross beam type traveling wave linear ultrasonic motor, which comprises a stator and a rotor, and is characterized in that the stator comprises a metal elastomer, a piezoelectric ceramic group and a plurality of driving teeth, and the piezoelectric ceramic group comprises excitation piezoelectric ceramics and energy-absorbing piezoelectric ceramics; the two ends of the metal elastomer are connected with the end of the excitation piezoelectric ceramic and the end of the energy-absorbing piezoelectric ceramic respectively, the other end of the energy-absorbing piezoelectric ceramic is connected with one end of the impedance matching circuit, the other end of the impedance matching circuit is connected with the metal elastomer, and driving teeth distributed at equal intervals are arranged in the middle of the upper surface of the metal elastomer. The driving teeth are arranged between the metal elastic body and the rotor; compared with a traditional linear traveling wave ultrasonic motor, the traveling wave type linear ultrasonic motor with the fixed end and the energy consumption structure is simpler and more compact in structure, high in traveling wave component proportion and high in electromechanical energy conversion efficiency.

Description

technical field [0001] The invention relates to a beam type traveling wave type linear ultrasonic motor with fixed ends, belonging to the technical field of ultrasonic motors. Background technique [0002] At present, for most traveling wave type linear ultrasonic motors, there are generally two design schemes. One is to imitate the annular traveling wave type ultrasonic motor and design the stator as a closed structure to avoid the occurrence of traveling waves in a non-closed structure. The characteristics of end reflection; the current popular closed structure linear ultrasonic motor in the generation of traveling waves is mainly through a plurality of patch piezoelectric ceramics are bonded to the elastic body at a quarter wavelength apart, and the phase The alternating current with a mutual difference of π / 2 generates two columns of standing waves with a phase difference of π / 2 in space and time. Synthetic traveling waves, thereby exciting the elliptical trajectory moti...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a beam-type traveling-wave linear ultrasonic motor with fixed ends to solve the problems of complex structure and difficult processing in the prior art

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